linux-kernel - [PATCH 5.15 086/207] net: dsa: mv88e6xxx: Drop unnecessary check in mv88e6393x_serdes_erratum_4

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Date:   Mon,  6 Dec 2021 15:55:40 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Marek Behún <kabel@...nel.org>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 5.15 086/207] net: dsa: mv88e6xxx: Drop unnecessary check in mv88e6393x_serdes_erratum_4_6()

From: Marek Behún <kabel@...nel.org>

commit 8c3318b4874e2dee867f5ae8f6d38f78e044bf71 upstream.

The check for lane is unnecessary, since the function is called only
with allowed lane argument.

Signed-off-by: Marek Behún <kabel@...nel.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/dsa/mv88e6xxx/serdes.c |   28 +++++++++++-----------------
 1 file changed, 11 insertions(+), 17 deletions(-)

--- a/drivers/net/dsa/mv88e6xxx/serdes.c
+++ b/drivers/net/dsa/mv88e6xxx/serdes.c
@@ -1284,26 +1284,20 @@ static int mv88e6393x_serdes_erratum_4_6
 	 * It seems that after this workaround the SERDES is automatically
 	 * powered up (the bit is cleared), so power it down.
 	 */
-	if (lane == MV88E6393X_PORT0_LANE || lane == MV88E6393X_PORT9_LANE ||
-	    lane == MV88E6393X_PORT10_LANE) {
-		err = mv88e6390_serdes_read(chip, lane,
-					    MDIO_MMD_PHYXS,
-					    MV88E6393X_SERDES_POC, &reg);
-		if (err)
-			return err;
+	err = mv88e6390_serdes_read(chip, lane, MDIO_MMD_PHYXS,
+				    MV88E6393X_SERDES_POC, &reg);
+	if (err)
+		return err;
 
-		reg &= ~MV88E6393X_SERDES_POC_PDOWN;
-		reg |= MV88E6393X_SERDES_POC_RESET;
+	reg &= ~MV88E6393X_SERDES_POC_PDOWN;
+	reg |= MV88E6393X_SERDES_POC_RESET;
 
-		err = mv88e6390_serdes_write(chip, lane, MDIO_MMD_PHYXS,
-					     MV88E6393X_SERDES_POC, reg);
-		if (err)
-			return err;
+	err = mv88e6390_serdes_write(chip, lane, MDIO_MMD_PHYXS,
+				     MV88E6393X_SERDES_POC, reg);
+	if (err)
+		return err;
 
-		return mv88e6390_serdes_power_sgmii(chip, lane, false);
-	}
-
-	return 0;
+	return mv88e6390_serdes_power_sgmii(chip, lane, false);
 }
 
 int mv88e6393x_serdes_setup_errata(struct mv88e6xxx_chip *chip)